I always thought it was time, but I've been informed that space/time composes part of the third dimension.

It's occurred to me that quantum entanglement's so-called "spooky action at a distance" could be explained if the entangled particles are actually not "at a distance". That is, that there is a "0th dimension" - possibly the size of the whole universe - in which all matter is at a single point.

Has anyone explored this concept?

Most people know about 3Ds. And some people have theories on 4Ds. So my question is, how many theories on new dimensions(if there is any) have been created? What are these new dimensions called? And have these theories ever been acknowledged by other people?

Can anyone explain what the National Routeing Guide means by “The routes 'London' and 'not London' are not necessarily mutually exclusive."

And does this extra insight into their world go any way to help us understanding what “use all of the doors when boarding” and “use all of the space in the carriages” mean?

See:  http://en.wikipedia.org/wiki/National_Routeing_Guide

 Is it the reason we exist at all? Because atoms can be in more than one place at any time it is not until an atom is measured or viewed that it then takes up the position that it does, so without anything to view it an atom is in many places at the same time, do our thoughts cause this three dimensional universe we live in to exist, to be, to happen? without some sort of consciousness, a viewer, be it human or any other life form this universe would not be here, I would not be writing this and you would not be reading it. Is life just thought? And so does it gives us the ability to live in a physical form in a three dimensional world? 

I know string theory suggests there might be 11 dimensions that are tightly wrapped into an extremely small space. What I'm wondering is whether there could be a dimension extending outward beyond the three we're familiar with. My favorite science book is Flatland which explores this, but in the light of modern discoveries and current theories, is it still considered possible? Is there anything that prohibits it?

It seems to me that an expanded fourth dimension could play a roll in quantum entanglement, although I'm sure someone must have considered this before.

Let x = the angle between dimensions. A cube is described in 3 dimensions, knowing x = 90 degrees. The same cube can be described in 7 dimensions when x = 45 degrees. The 2nd decription is more complex but it's still a cube. If an object can be described by any number of higher dimensions and the matching value of x then our universe is only 3 dimensional if x = 90 degrees. Who proved x can only ever equal 90 degrees? or have we presumed we live in a 3D universe simply because x = 90 degrees is mathematically and geometrically convienient?